During my the summer I had the opportunity to join seven other faculty at Red Hat HQ for a one-week workshop regarding the use of open source software projects in the academy.
[ RED HAT ] A Fortune 500 company. They sell services surrounding Linux.
[ LINUX ] An operating system, which makes it like Windows. A critical difference is that Linux is written by (literally) tens of thousands of volunteers around the planet.
[ OPEN SOURCE ] Software (or other content) for which the code (or original source) is freely available. See also the CREATIVE COMMONS.
The workshop was called POSSE (Professors' Open Source Summer Experience). We worked with engineers at Red Hat as well as faculty from institutions around the world, learning the tools and community processes that surround open source projects. The revelation for me was that these large, open source projects (Firefox is an excellent example) are not just about code: documentation, PR, and many other aspects of their operation are managed in an open manner.
[ OPEN ] An open project is one which outsiders can join simply by contributing and adhering to the processes described for participation.
[ DOCUMENTATION ] The manuals, web pages, and other written materials that support the use of a piece of software.
[ PR ] Public Relations; fliers, advertisements, web pages, press releases, articles, and other material that support the promotion of a project.